The Approach to Tetanic Hypocalcemia Caused by Vitamin D Deficiency.

Recently studies have shown that over half of infants, children and teenagers may be inadequately supplemented. A high prevalence of vitamin D deficiency in children has been observed worldwide, even in sunny countries. Regardless of the recommendations, vitamin D supplementation is sometimes underestimated, supporting the idea that for children in sunny country it is unnecessary. In the modern area of supplementation, tetany seems to be a problem of the past. Usually it occurs at 3 to 6 months of age, that's why diagnostic suspicion may be low after this age. We report a case of severe hypocalcemia presented with tetany, in an18-months-old child with severe vitamin D deficiency, because of not receiving vitamin D as supplementation. With underestimation of vitamin D supplementation, tetany may emerge again. Through our report we aim to highlight the aggressive approach to tetanic hypocalcemia in children with vitamin D deficiency and to sensitize a rigorous surveillance in order to ensure adequate vitamin D supplementation by pregnant, breastfeeding mothers, children and adolescents.

Characterization and chromosomal localization of the chicken avidin gene family.

Chicken avidin is a biotin-binding protein expressed under inflammation in several chicken tissues and in the oviduct after progesterone induction. The gene encoding avidin belongs to a family that has been shown to include multiple genes homologous to each other. The screening and chromosomal localization studies performed to reveal the structure and organization of the complete avidin gene family is described. The avidin gene family is arranged in a single cluster within a 27-kb genomic region. The cluster is located on the sex chromosome Z on band q21. The organization of the genes was determined and two novel avidin-related genes, AVR6 and AVR7, were cloned and sequenced.

Use of methohexital for elective intubation in neonates.

The effectiveness and safety of a short acting barbiturate, methohexital, was assessed for its use at the time of elective intubation in 18 newborn infants with severe respiratory or cardiac conditions. Evaluation included the speed of action and the degree of relaxation, sedation, and sleep in the first five minutes after administration. All newborn infants were intubated in a fully relaxed and somnolent state. In most infants recovery was completed within five minutes. A slight to moderate oxygen saturation drop was observed during the period of intubation, especially in patients with cyanotic heart disease. The side effects of the drug were twitching and a slight drop in blood pressure. In conclusion, methohexital seems to be a useful drug for short term anaesthesia in neonates, during which, short procedures like elective intubation can be safely performed.